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Manage Design Data

Assign variable values using model workspace, symbols, data objects, and data classes

You can use MATLAB® variables to configure and manage signals and block parameters in a model. For more information about how models use variables, see Symbol Resolution. To create, edit, and manage variables, see Create, Edit, and Manage Workspace Variables.

You can store model variables in the MATLAB base workspace, a model workspace, or a data dictionary. To decide where to store variables for your model, see Determine Where to Store Variables and Objects for Simulink Models.

To use variables to control signal and parameter characteristics, such as data types and code generation settings, you can store data objects in a workspace or data dictionary. See Data Objects.


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Simulink.findVarsAnalyze relationship between variables and blocks in models workspace variables to MATLAB script MATLAB expression in context of Simulink model variable values in context of Simulink model existence of variable in context of Simulink model new data dictionary and create object data dictionary for editing file names and paths of open data dictionaries
Simulink.LibraryDictionary.clearClear library dictionary dependency analysis
Simulink.LibraryDictionary.refreshUpdate library dictionary dependencies


Simulink.ModelWorkspaceInteract with the model workspace of a model programmatically
Simulink.WorkspaceVarStore information about workspace variables and blocks that use them
Simulink.VariableUsageStore information about the relationship between variables and blocks in models
Simulink.CoderInfoSpecify information needed to generate code for signal, state, or parameter data data dictionary data dictionary section data dictionary entry enumerated type definition in data dictionary


Data Storage in Model Workspace

Model Workspaces

Place variables and objects that a model uses in a workspace that only the model can access.

Change Model Workspace Data

When you store data in a model workspace, you choose a data source, such as the model file or an external MAT-file. To modify the variables at the source, you use a different procedure depending on the type of source that you selected.

Specify Source for Data in Model Workspace

Store variables and objects that a model uses in the model file or in a separate file. Optionally, store the variables and objects as code that you can modify.

Data Storage in Dictionary

What Is a Data Dictionary?

Use a data dictionary to store external data for a model.

Import and Export Dictionary Data

Migrate data between a data dictionary and a MAT-file or MATLAB script file.

View and Revert Changes to Dictionary Data

Use a data dictionary to inspect and manage changes to model data.

Migrate Models to Use Simulink Data Dictionary

Store variables and objects in data dictionaries.

Partition Dictionary Data Using Referenced Dictionaries

Create referenced dictionaries to store subsets of the data that a model or model hierarchy uses.

Partition Data for Model Reference Hierarchy Using Data Dictionaries

Compose a dictionary hierarchy based on a model reference hierarchy.

Link Data Dictionary to Custom Libraries

Share data objects with Simulink block library users by using a linked data dictionary.

Enumerations in Data Dictionary

Store enumerated type definitions and enumerated data in a data dictionary.

Store Data in Dictionary Programmatically

Use scripts and the command prompt to create and interact with data dictionaries.

Data Storage in Objects and Variables

Determine Where to Store Variables and Objects for Simulink Models

Model data are objects and variables that you create in workspaces such as the base workspace or a data dictionary. Choose a technique to permanently store that data.

Create, Edit, and Manage Workspace Variables

Workspace variables enable you to share information, such as parameter values and data types, between blocks and models. Use different tools and techniques to create and manipulate workspace variables.

Edit and Manage Workspace Variables by Using Model Explorer

Find out which workspace variables are used by a model or block, find blocks that use a variable, find unused variables, and rename a variable everywhere it is used by blocks. Save and load variables from a separate file.

Data Objects

Specify properties for parameters, signals, and states, including parameter values, outside of a block diagram by using external data objects.

Symbol Resolution

You can control how blocks in a model resolve symbols to variables and objects that you create in workspaces.

Define Data Classes

Customize the way your model interacts with data (signals, parameters, and states) by creating your own class of data object.

Upgrade Level-1 Data Classes

Simulink® no longer supports level-1 data classes. You must upgrade data classes that you created using the level-1 data class infrastructure, which was removed in a previous release.

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